Battery charger



FIG. 1--is a top front left perspective view of a battery charger;

FIG. 2--is a frontal view of a battery charger;

FIG. 3--is a rear view of a battery charger;

FIG. 4--is a top view of a battery charger;

FIG. 5--is a bottom view of a battery charger;

FIG. 6--is left side view of a battery charger; and,

FIG. 7--is a right side view of a battery charger. 

The ornamental design for a battery charger, as shown and described. 